100G DWDM QSFP28 PAM4 120km Solution

PAM4, also referred to as Pulse Amplitude Modulation 4-level, is one of the mainstream optical transmission technologies following non-return-to-zero (NRZ). PAM4 is a technology encoding two bits of data with four distinct signal levels. It essentially doubles the signal bandwidth of a connection with each signal level representing 2 bits of logic information. In addition, as a key role in multi-order modulation, it can minimize optical signal degradation while doubling the data rate, which makes it the most efficient and cost-effective enabler of 100G and 400G. To make it more specific, check the following figure to see how PAM4 doubles the data rate with four signal levels by comparing it with NRZ.


For 100G transceiver modules, QSFP28 PAM4 can reduce the number of lasers and eliminate the need for optical multiplexing. For 400G, the largest expenditure would be optical components and related radio frequency packages. PAM4 can transmit two bits of logic information and double the bandwidth to effectively reduce the transmission costs and at the same time, meet the needs of bandwidth improvements.

3C-LINK 100G DWDM QSFP28 PAM4 Solution

Based on the bandwidth demands of global users, 3C-LINK provides 100G DWDM QSFP28 PAM4 solution integrated with DWDM QSFP28 PAM4 transceiver and fiber cables to achieve high-speed signal transmission and the construction of 100G.


            Figure 3: 3C-LINK QSFP28 PAM4 Solution--100G DWDM QSFP28 PAM4 120km DOM CS 
Featuring low power consumption, high speed and long transmission distance, QSFP28 PAM4 would be the most cost-effective and efficient solution for data centers or campus and enterprise links to upgrade their networks into 100G/400G.